Granted Patent
Utility
US 6,774,753 · App. 10/436,204
Normally closed electromagnetic valve
Inventors:
Takaomi Shirase, Naoki Masuda
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: May 13, 2003
Inventors
Takaomi Shirase
Naoki Masuda
Assignee (at issue)
NISSIN KOGYO CO., LTD.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.